新型气液分离闪蒸撬分液侧内流场模拟研究

为研究气液分离闪蒸撬分液侧结构对其分离特性影响,优化其结构参数,建立了分液侧分离特性模拟模型,采用数值方法,分析了结构参数对分液侧分离特性的影响规律。结果表明,捕雾器厚度、连通管数量和布置位置,以及导流板角度和深度是影响分液侧分离效果的主要影响因素,捕雾器直径和折流板深度对其分离特性的影响较小；捕雾器厚度60mm-120mm时,分液侧分离效率高达98%；分离腔体与积液筒之间采用两根以上连通管,并分别布置在分离腔积液区和气相区时,有利于排液,可避免积液筒气塞现象。导流板角度在90°-135°,深度在385mm-647mm范围时,分离腔内部积液区流速较小,流场扰动较小,排液流畅,分离效率较高。上述研究成果,将为新型气液分离闪蒸撬分液侧结构优化及设计提供理论指导。

Numerical Study on the Internal Flow Fluid of the Gas-Liquid Separation Unit in a New Skid-mounted Device with Gas-Liquid Separation and Flash Distillation

In order to optimize the structural parameters of gas-liquid separation unit in a new skid-mounted device with gas-liquid separation and flash distillation, a model is established to analyze the separation characteristics of that. The influence of structural parameters is investigated for the separation characteristics of gas-liquid separation unit by the CFD method. The results show that the demister thickness, the number and location of pipe between the separation chamber and the cylinder to accumulate the liquid, the angle and depth of deflector in separation chamber is main parameters to impact the separation characteristics of gas-liquid separation unit. It is slightly impacted by the demister diameter and baffle plate depth. The separation efficiency of gas-liquid separation unit will reach to 98% when the demister thickness is 60mm-120mm. At the same time,the liquid in separation chamber can be discharged smoothly into the cylinder when the number of pipe between the separation chamber and the cylinder is more than two and it is distributed in the liquid and gas regions of the separation chamber, respectively. The liquid flow quite slowly can be also discharged smoothly into the cylinder when the angle and depth of deflector is 90°-135° and 385mm-647mm, respectively. Therefore, the separation efficiency is very high for the gas-liquid separation unit. The above results will provide the theoretical guidance for the optimization and design of structural parameters on gas-liquid separation unit in a new skid-mounted device with gas-liquid separation and flash distillation.